determine if use chiller or dry cooler based on these equations or an external COP file.

[gschivley]

In file src/model/resources/underground_thermal_energy_storage/ATES.jl

GenX.jl/src/model/resources/underground_thermal_energy_storage/ATES.jl

Line 25 in 5430d12

use_chiller = Dict((y, t) => pAmbientTemp[gen[y].zone, t] + gen[y].temp_lift_chiller_c + gen[y].temp_approach_chiller_c - gen[y].temp_evaporator_chiller_c > 0